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- Γ@WeightingScore 10,3,1,1
-
- @atGraphic 25,5
- @Picture algebra\a010102.bmp
- @at 50,5
- Look at these piles of bricks.
- @atGraphic 50,47
- @Picture algebra\a010103b.bmp
-
- @InputWidth 20
- @at 5,132
- Choose the brick piles that are triangular
- numbers and enter the numbers of bricks into
- the number pattern below.
- @at ,+4
- 1st term 2nd term 3rd term 4th term
- @at ,+8
- #[N] #[N] #[N] #[N]
- @at ,+8
- Remember a triangular number must form a
- triangle when drawn out. The number 1 is
- counted as a triangular number.
- @Answer 4, 1,3, 6, 10
- @Feedback E1,?,?,?,?
- No, nearly right, remember each
- number must form a triangle if
- drawn out as a series of dots.
- @Feedback 0,?,?,?,?
- No, each number must form a
- triangle if drawn out as a series of dots.
-
-
-
-
-
-
-
-
- @question
- @newpage
- @atGraphic 25,5
- @Picture algebra\a010102.bmp
- @at 5,35
- 1st term 2nd term 3rd term 4th term 5th term
- @at ,-1
- 1 3 6 10 15
- @at ,+4
- Work out the rule that connects the numbers in
- @At ,-1
- the triangular number.
- @at ,+5
- @InputWidth 102
- To find the #[A] find the
- @at ,+5
- #[A] the #[A]
- @at ,+5
- add #[A] then add the result
- @at ,+5
- to the #[A].
- @at ,+8
- #Anext╛term# #Adifference╛between#
- @at ,+7
- #Alast╛two╛terms# #Alast╛term#
- @at ,+7
- #A1# #A2#
-
-
- @Answer 5, next╛term, difference╛between, last╛two╛terms, 1, last╛term
- @Feedback E1,?,?,?,?,?
- No, the complete rule is: to find the next
- term find the difference between the
- last two terms then add 1.
- @Feedback 0,?,?,?,?,?
- No, the rule is: to find the next term
- find the difference between the last
- two terms then add 1.
-
-
-
- @Question
- @at 5,+10
- The numbers in the triangular number pattern
- can also be represented as :
- @at ,+5
- 1st term 2nd term 3rd term 4th term
- 1 3 6 10
- @at ,-2
- 1 2 + 1 3 + 2 + 1 4 + 3 + 2 + 1
- @at ,+4
-
- Using this rule work out the value of the
- @at ,+2
- @inputWidth 20
- 7th term? #[N]
- @Answer 1,28
- @Feedback 0, ?
- No, the 7th term will be
- 7 + 6 + 5 + 4 + 3 + 2 + 1 = 28
- @Feedback 1
- Good.
-
-